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<br />
Try to run Spybot - Search &amp;&nbsp;Destroy:<br />
<br />
<a href="http://www.safer-networking.org/index2.html" rel="ugc">http://www.safer-networking.org/index2.html</a>
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Try to run Spybot - Search & Destroy:

http://www.safer-networking.org/index2.html [http://www.safer-networking.org/index2.html]

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here a description : &nbsp;<a href="http://www.microsoft.com/security/portal/Threat/Encyclopedia/Entry.aspx?Name=Trojan:DOS/Alureon.A" rel="ugc nofollow">http://www.microsoft.com/security/portal/Threat/Encyclopedia/Entry.aspx?Name=Trojan:DOS/Alureon.A</a><br />
<br />
and here a fix - fully described : &nbsp;<a href="http://www.computing.net/answers/security/how-do-i-remove-dosalureona/32238.html" rel="ugc">http://www.computing.net/answers/security/how-do-i-remove-dosalureona/32238.html</a>
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here a description :  http://www.microsoft.com/security/portal/Threat/Encyclopedia/Entry.aspx?Name=Trojan:DOS/Alureon.A [http://www.microsoft.com/security/portal/Threat/Encyclopedia/Entry.aspx?Name=Trojan:DOS/Alureon.A]

and here a fix - fully described :  http://www.computing.net/answers/security/how-do-i-remove-dosalureona/32238.html [http://www.computing.net/answers/security/how-do-i-remove-dosalureona/32238.html]

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Run TdssKiller and Hitmanpro to see if they resolve the Mbr infection<br />
<a href="http://support.kaspersky.com/viruses/solutions?qid=208280684" rel="ugc">http://support.kaspersky.com/viruses/solutions?qid=208280684</a><br />
<a href="http://www.surfright.nl/en/hitmanpro" rel="ugc">http://www.surfright.nl/en/hitmanpro</a>
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Run TdssKiller and Hitmanpro to see if they resolve the Mbr infection
http://support.kaspersky.com/viruses/solutions?qid=208280684 [http://support.kaspersky.com/viruses/solutions?qid=208280684]
http://www.surfright.nl/en/hitmanpro [http://www.surfright.nl/en/hitmanpro]

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Repaired the master boot record and the problem went away.
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Repaired the master boot record and the problem went away.

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I have a computer that is having problems with a trojan. The DNS settings were being removed every time we booted the computer.<br />
<br />
I was able to fix that using combofix, but now when I run Microsoft Security Essentials it keeps coming up with trojan:DOS/Alureon.A and it removes it sometimes, quarantines it another time, but keeps finding it everytime. Sometimes it can't even do anything with it. It's definitions are updated but now it's having trouble updating too. How do I remove the trojan permanently?<br />
<br />
I have run Malwarebytes on this computer as well.
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I have a computer that is having problems with a trojan. The DNS settings were being removed every time we booted the computer.

I was able to fix that using combofix, but now when I run Microsoft Security Essentials it keeps coming up with trojan:DOS/Alureon.A and it removes it sometimes, quarantines it another time, but keeps finding it everytime. Sometimes it can't even do anything with it. It's definitions are updated but now it's having trouble updating too. How do I remove the trojan permanently?

I have run Malwarebytes on this computer as well.

trojan:DOS/Alureon.A removal windows xp

Microsoft Windows XP is the sixth release of the NT series of operating systems, and was the first to be marketed in a variety of editions: XP Home and XP Professional, designed for business and power users. The advanced features in XP Professional are generally disabled in Home Edition, but are there and can be activated. There were two 64-bit editions, an embedded edition and a tablet edition.

Windows XP

A vulnerability is a weakness which allows an attacker to reduce a system's information assurance. Vulnerability is the intersection of three elements: a system susceptibility or flaw, attacker access to the flaw, and attacker capability to exploit the flaw. To exploit a vulnerability, an attacker must have at least one applicable tool or technique that can connect to a system weakness, known as the attack surface. Vulnerability management is the cyclical practice of identifying, classifying, remediating, and mitigating vulnerabilities. Other vulnerabilities include security risks, security defects and constructs in programming languages that are difficult to use properly.

Vulnerabilities

Anti-virus software was originally developed to detect and remove computer viruses. However, with the proliferation of other kinds of malware, antivirus software started to provide protection from other computer threats. In particular, modern antivirus software can protect from malicious browser helper objects (BHOs), browser hijackers, ransomware, keyloggers, backdoors, rootkits, trojan horses, worms, malicious layered service providers (LSPs), dialers, fraud tools, adware and spyware. Some products also include protection from other computer threats, such as infected and malicious URLs, spam, scam and phishing attacks, online identity theft (privacy), online banking attacks, social engineering techniques, Advanced Persistent Threat (APT), botnets and DDoS attacks.